CN111540538B - Large-section high-temperature-resistant mobile flexible cable for high-temperature equipment and preparation process thereof - Google Patents
Large-section high-temperature-resistant mobile flexible cable for high-temperature equipment and preparation process thereof Download PDFInfo
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- CN111540538B CN111540538B CN202010291704.4A CN202010291704A CN111540538B CN 111540538 B CN111540538 B CN 111540538B CN 202010291704 A CN202010291704 A CN 202010291704A CN 111540538 B CN111540538 B CN 111540538B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
- H01B7/421—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation
- H01B7/423—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation using a cooling fluid
- H01B7/425—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation using a cooling fluid the construction being bendable
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/10—Insulating conductors or cables by longitudinal lapping
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2606—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by braiding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0009—Details relating to the conductive cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0208—Cables with several layers of insulating material
- H01B7/0225—Three or more layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0258—Disposition of insulation comprising one or more longitudinal lapped layers of insulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1865—Sheaths comprising braided non-metallic layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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Abstract
The invention discloses a large-section high-temperature-resistant mobile flexible cable for high-temperature equipment and a preparation process thereof, wherein the preparation process comprises the following steps: s1: a stranded conductor; s2: stranding cable cores: arranging the conductor around a central cooling tube to make a first conductor layer; and arranging the conductors and the cooling pipes outside the first conductor layer at intervals to form a cooling layer. The cable cooling pipe has the advantages that the contact area between the cable cooling pipe and the conductor is large, the cooling efficiency is high, three layers of basalt materials including the basalt lapping layer, the basalt braided layer and the basalt sheath guarantee the high-temperature resistance of the cable, the wire diameter of the cable is reduced, the cable can slide relatively when bent by means of low friction between the conductor and the basalt lapping layer and the low wire diameter of the cable, the cable can move and bend after being laid, flammable materials such as rubber and the like do not exist in the cable, the cable can work in an environment of 600 ℃ without sintering, pollution is avoided when the cable is used, the mechanical performance is reduced, and the service life at high temperature is long.
Description
Technical Field
The invention relates to a cable, in particular to a large-section high-temperature-resistant movable flexible cable for high-temperature equipment and a preparation process thereof.
Background
The working environment of the cable is quite variable, and in actual field work, the cable arranged in a high temperature area, for example, the environment temperature reaches more than 250 ℃, is often encountered. Under the high-temperature working environment, the common cable cannot bear the working temperature and is damaged or the performance of the common cable is reduced, so that signal or power transmission faults are caused, the main body equipment is subjected to fault tripping, outage and even damage, and great hidden dangers exist for the safe use of the main body equipment. And the high-temperature area can not enter the high-temperature area in normal operation, so that great difficulty is brought to the maintenance work. The above situation brings great harm to the safety and economy of the power equipment.
At present, domestic high-temperature-resistant cables are mainly made of fluoroplastics, or polytetrafluoroethylene or other composite materials. The fluoroplastic insulation temperature-resistant grade is low, and the maximum allowable long-term working temperature is about 200 ℃. The polytetrafluoroethylene and the composite material mainly adopt a wrapping and sintering process, and the sintering process has the defects of high pollution and environmental pollution, can release toxic and harmful gas and is not good for the health of staff.
The other high-temperature-resistant cable adopts a metal sheath, is fixedly arranged, cannot be bent and is very inconvenient to use.
Therefore, it is required to develop a large-section high-temperature-resistant mobile flexible cable for high-temperature equipment, which allows the working temperature to be 600 ℃ for a long time, is pollution-free and environment-friendly, and a preparation process thereof.
Disclosure of Invention
The invention aims to provide a large-section high-temperature-resistant mobile flexible cable for high-temperature equipment, which allows the working temperature to be 600 ℃ for a long time, is pollution-free and environment-friendly, and a preparation process thereof.
The first technical scheme for realizing the aim of the invention is as follows:
a preparation process of a large-section high-temperature-resistant mobile flexible cable for high-temperature equipment comprises the following steps:
s1: a stranded conductor;
s2: stranding cable cores: arranging the conductor around a central cooling tube to make a first conductor layer; arranging the conductors and cooling pipes outside the first conductor layer at intervals to form a cooling layer; arranging the conductor outside the cooling layer to manufacture a second conductor layer; and regularly twisting the central cooling pipe, the first conductor layer, the cooling layer and the second conductor layer to form the cable core.
S3: a basalt lapping layer is wound outside the cable core;
s4: wrapping an inner mica tape insulating layer outside the basalt wrapping layer;
s5: weaving a basalt braid layer outside the inner mica tape insulating layer;
s6: wrapping an outer mica tape insulating layer outside the basalt braided layer;
s7: and weaving a basalt sheath outside the outer mica tape insulating layer.
In the step S1, 1560 nickel-plated copper wire bundles with the wire diameter of 0.39mm are stranded into 30 strands of conductors, each strand has 52 strands, and the strand pitch is 77-90 mm.
In step S2, arranging six conductors around the central cooling tube to form the first conductor layer; arranging six conductors and six cooling pipes outside the first conductor layer at intervals to form the cooling layer, wherein the stranding pitch is 155-194 mm; eighteen conductors are arranged outside the cooling layer to form the second conductor layer, and the stranding pitch is 226-291 mm; and regularly twisting the central cooling pipe, the first conductor layer, the cooling layer and the second conductor layer to form the cable core, wherein the twisting pitch of the outermost layer is 272-317 mm.
In the step S3, the basalt lapping layer is lapped by using basalt fiber fireproof cloth with the width of 25 mm; the thickness of the basalt lapping layer is 0.2mm, the lapping rate is 15% -25%, and the lapping layer is 1 layer.
In the step S4, the inner mica tape insulating layer is provided with four layers of lapping, two layers of lapping are first left-hand lapping, and two layers of lapping are then right-hand lapping.
In the step S5, the basalt braided layer is braided by adopting high-temperature-resistant basalt fibers, a 32-spindle braiding machine is adopted, 12 bundles of high-temperature-resistant basalt fibers are braided per spindle, the braiding angle is 35-45 degrees, and the braiding density is more than or equal to 85 percent; the basalt braided layer meets the requirements that the tensile strength of fibers is more than or equal to 2600MPa at normal temperature, the tensile breaking strength of yarns after heat treatment is more than or equal to 0.20N/tex, the strength retention rate is more than or equal to 50%, and the thickness of the basalt braided layer is 0.2 mm.
In the step S6, the outer mica tape insulating layer is provided with four layers, two layers are wound in the left direction first, and two layers are wound in the right direction later.
In the step S7, the basalt sheath is woven by adopting high-temperature-resistant woven basalt fibers, a 32-spindle weaving machine is adopted, 15 bundles of high-temperature-resistant basalt fibers are woven in each spindle, the weaving angle is 35-45 degrees, and the weaving density is not less than 85 percent; the basalt braided layer meets the requirements that the tensile strength of fibers is more than or equal to 2600MPa at normal temperature, the tensile breaking strength of yarns after heat treatment is more than or equal to 0.20N/tex, the strength retention rate is more than or equal to 50%, and the thickness of the basalt jacket is 0.2 mm.
The invention also provides a large-section high-temperature-resistant mobile flexible cable for high-temperature equipment, which is prepared by the preparation process and comprises a cable core, and a basalt lapping layer, an inner mica tape insulating layer, a basalt braiding layer, an outer mica tape insulating layer and a basalt sheath which are sequentially wrapped outside the cable core from inside to outside; the cable core comprises a central cooling pipe, and a first conductor layer, a cooling layer and a second conductor layer which are sequentially wound outside the central cooling pipe from inside to outside; the first conductor layer and the second conductor layer are both formed by conductors; the cooling layer is composed of conductors and cooling pipes which are arranged at intervals.
First conductor layer external diameter 9.0mm, cooling layer external diameter 15.0mm, second conductor layer external diameter 21.0 mm. The conductor cross-section is big, and transmission of electricity flow is big, and the cooling tube pipe diameter is big, can be through more coolant, and the cooling effect is good.
The conductors in the first conductor layer, the second conductor layer and the cooling layer are formed by twisting 52 nickel-plated copper wires, and the diameter of each nickel-plated copper wire is 0.390 mm.
The central cooling pipe and the cooling pipe are hollow red copper pipes which are filled with cooling media; the inner diameters of the central cooling pipe and the cooling pipe are 2.0mm, and the thickness of the pipe wall is 0.5 mm.
The inner mica tape insulating layer and the outer mica tape insulating layer are wound in multiple layers, and the winding direction is changed every two layers.
Preferably, the inner mica tape insulating layer and the outer mica tape insulating layer are respectively provided with four layers, two layers are wound in the left direction, and two layers are wound in the right direction.
The basalt lapping layer is made of 25 mm-wide basalt fiber fireproof cloth, the thickness of the basalt lapping layer is 0.2mm, the lapping rate is 15% -25%, and 1 layer of lapping is adopted.
The basalt braided layer is braided by adopting 32-spindle high-temperature-resistant basalt fibers, each spindle is provided with 12 bundles of high-temperature-resistant basalt fibers, and the braiding density is more than or equal to 95%; the basalt braided layer meets the requirements that the tensile strength of fibers is more than or equal to 2600MPa at normal temperature, the tensile breaking strength of yarns after heat treatment is more than or equal to 0.20N/tex, the strength retention rate is more than or equal to 50%, and the braided thickness is 0.2 mm.
The basalt sheath is woven by 32-spindle high-temperature-resistant basalt fibers, each spindle is provided with 15 bundles of high-temperature-resistant basalt fibers, and the weaving density is more than or equal to 95%; the basalt sheath can meet the requirements that the tensile strength of the fiber is more than or equal to 2600MPa at normal temperature, the tensile breaking strength of the yarn after heat treatment is more than or equal to 0.20N/tex, the strength retention rate is more than or equal to 50%, and the weaving thickness is 0.2 mm.
By adopting the technical scheme, the invention has the following beneficial effects:
(1) the cable is provided with the central cooling pipe and the cooling pipe in the cable core, the cooling pipe and the conductor are arranged at intervals and wound between the first conductor layer and the second conductor layer, the contact area between the cooling pipe and the conductor is large, the cooling efficiency is high, three layers of basalt materials including the basalt lapping layer, the basalt weaving layer and the basalt sheath are guaranteed, the high temperature resistance of the cable is guaranteed, the wire diameter of the cable is also reduced, the relative sliding of the cable during bending is guaranteed by means of low friction between the conductor and the basalt lapping layer and the low wire diameter of the cable, the cable can move and bend after being laid, flammable materials such as rubber and the like are not needed in the cable, the cable can work in an environment of 600 ℃ without sintering, pollution is not generated during use, the mechanical performance is reduced, the service life at high temperature is long, and the section is large, and the conveying efficiency is high.
(2) The conductor is formed by twisting the nickel-plated copper wires, the nickel-plated copper wires have good heat resistance, and can still keep good electric conduction and tensile properties at high temperature, and simultaneously the twisting, bending and tensile properties of the conductor are improved after twisting, and the bending property of the cable in a high-temperature environment is improved.
(3) The cable core comprises 1, 6, 12 and 18 cables from inside to outside in sequence, the arrangement is reasonable, the contact area between the central cooling pipe and the conductor is large, the cooling effect is good, the cable can normally work for a longer time at a high temperature, and the cable is more resistant to the high temperature.
(4) The central cooling pipe and the cooling pipe are hollow red copper pipes which are filled with cooling media, the red copper material is high in heat conduction efficiency and fast in heat dissipation, the high temperature in the cable can be led out quickly after the cooling media are filled, the heat dissipation performance of the cable in a high-temperature environment is improved, and the service life of the cable at the high temperature is guaranteed.
(5) The inner mica tape insulating layer and the outer mica tape insulating layer are wrapped in multiple layers, and the wrapping direction is changed for every two layers of wrapping, so that the insulating property and the tightness of the cable are improved, the cable is not easy to loosen, and the bending property of the cable is further enhanced.
(6) The basalt lapping layer adopts the basalt fiber fireproof cloth, so that the friction force is low, the relative sliding of the cable during bending is ensured, the cable can move and bend after being laid, the basalt fiber fireproof cloth has excellent heat resistance, the tightness of the cable core is increased, and the bending performance of the cable is enhanced.
(7) The basalt braided layer is braided by adopting 32-spindle high-temperature-resistant basalt fibers, and each spindle is provided with 12 bundles of high-temperature-resistant basalt fibers, so that the compactness and the heat resistance of the cable are further enhanced.
(8) The basalt sheath is woven by 32 ingots of high-temperature-resistant basalt fibers, 15 bundles of the high-temperature-resistant basalt fibers are used in each ingot, the high-temperature-resistant performance is good, the friction resistance is better, and the service life of the cable under the high-temperature performance is further prolonged.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which
Fig. 1 is a schematic structural view of a large-section high-temperature-resistant mobile flexible cable for high-temperature equipment according to the present invention.
The reference numbers in the drawings are as follows:
the cable comprises a cable core 1, a central cooling pipe 1-1, a conductor 1-2, a cooling pipe 1-3, a basalt lapping layer 2, an inner mica tape insulating layer 3, a basalt weaving layer 4, an outer mica tape insulating layer 5 and a basalt sheath 6.
Detailed Description
(example 1)
Referring to fig. 1, the large-section high-temperature-resistant mobile flexible cable for the high-temperature equipment in the embodiment includes a cable core 1, and a basalt lapping layer 2, an inner mica tape insulating layer 3, a basalt braiding layer 4, an outer mica tape insulating layer 5 and a basalt sheath 6 which are sequentially wrapped outside the cable core 1 from inside to outside. The cable core 1 comprises a central cooling pipe 1-1, and a first conductor layer, a cooling layer and a second conductor layer which are sequentially wound outside the central cooling pipe 1-1 from inside to outside. The first conductor layer and the second conductor layer are each constituted by conductors 1-2. The cooling layer is composed of conductors 1-2 and cooling pipes 1-3 which are arranged at intervals.
The external diameter of the first conductor layer is 9.0mm, the external diameter of the cooling layer is 15.0mm, and the external diameter of the second conductor layer is 21.0 mm. The section of the conductor 1-2 is large, the transmission flow is large, the diameter of the cooling pipe 1-3 is large, more cooling media can pass through, and the cooling effect is good.
The number of the conductors 1-2 in the first conductor layer, the second conductor layer and the cooling layer is 30, the conductors are stranded by 1560 nickel-plated copper strands, each strand is 52, the diameter of each strand is 0.390mm, the strand pitch is 77-90 mm, the number of the conductors in the first conductor layer and the number of the conductors in the cooling layer are 6, and the number of the conductors in the second conductor layer is 18. The diameter of the stranded wire is proper, so that the conductor 1-2 can be fully contacted with the cooling pipe 1-3, and the cooling effect is improved.
In order to increase the cooling efficiency, the central cooling pipe 1-1 and the cooling pipe 1-3 are hollow red copper pipes which are filled with cooling media. The inner diameters of the central cooling pipe 1-1 and the cooling pipe 1-3 are 2.0mm, the pipe wall thickness is 0.5mm, the heat conduction efficiency of the copper pipe is high, the introduced cooling medium comprises liquid nitrogen and air, the heat dissipation rate of the cable is greatly enhanced, the high temperature resistance and the current-carrying capacity of the cable are increased, and the use section of the cable is reduced.
In order to increase the tightness of the cable, the inner mica tape insulating layer 3 is provided with four layers, two layers are wound in the left direction firstly, two layers are wound in the right direction afterwards, and the two layers are wound in the reverse direction, so that the looseness is not easy to occur, the insulating property is enhanced, the cable is more compact, and the looseness is not easy to occur during bending.
In order to enhance the heat resistance of the cable, basalt fiber fireproof cloth with the width of 25mm is adopted in the basalt lapping layer 2, the thickness of the basalt lapping layer 2 is 0.2mm, the lapping rate is 15% -25%, and the lapping layer 1 is covered.
The basalt braided layer 4 is braided by adopting 32-spindle high-temperature-resistant basalt fibers, each spindle is provided with 12 bundles of high-temperature-resistant basalt fibers, and the braiding density is more than or equal to 95%. The basalt braided layer 4 meets the requirements that the tensile strength of the fiber is more than or equal to 2600MPa at normal temperature, the tensile breaking strength of the yarn after heat treatment is more than or equal to 0.20N/tex, the strength retention rate is more than or equal to 50 percent, and the thickness of the basalt braided layer 4 is 0.2 mm.
In order to further enhance the heat resistance of the cable, the basalt sheath 6 is woven by 32 ingots of high-temperature-resistant basalt fibers, and 15 bundles of high-temperature-resistant basalt fibers are woven in each ingot, wherein the weaving density is more than or equal to 95%. The basalt sheath 6 meets the requirements that the tensile strength of the fiber is more than or equal to 2600MPa at normal temperature, the tensile breaking strength of the yarn after heat treatment is more than or equal to 0.20N/tex, the strength retention rate is more than or equal to 50%, and the thickness of the basalt sheath 6 is 0.2 mm.
The large-section high-temperature-resistant movable flexible cable for the high-temperature equipment of the embodiment adopts the large-section conductor and the thin sheath, so that the heat resistance and the bending property are ensured, the power transmission performance of the cable is further improved, the outer diameter is reduced, and the cable is convenient to lay.
The preparation process of the large-section high-temperature-resistant mobile flexible cable for the high-temperature equipment comprises the following steps of:
s1: the stranded conductor 1-2. 1560 nickel-plated copper wire bundles with the wire diameter of 0.39mm are stranded into 30 strands of conductors 1-2, each strand is 52, and the strand pitch is 77-90 mm.
S2: stranding a cable core 1: the first conductor layer is made by arranging conductors 1-2 around a central cooling tube 1-1. And arranging conductors 1-2 and cooling pipes 1-3 outside the first conductor layer at intervals to form a cooling layer. And arranging conductors 1-2 outside the cooling layer to form a second conductor layer. The central cooling tube 1-1, the first conductor layer, the cooling layer and the second conductor layer are normally stranded to make a cable core 1.
The method specifically comprises the following steps: six conductors 1-2 are arranged around the central cooling tube 1-1 to make a first conductor layer. And six conductors 1-2 and six cooling pipes 1-3 are arranged outside the first conductor layer at intervals to form a cooling layer. And eighteen conductors 1-2 are arranged outside the cooling layer to form a second conductor layer. The central cooling tube 1-1, the first conductor layer, the cooling layer and the second conductor layer are normally stranded to make a cable core 1.
S3: and a basalt lapping layer 2 is wound outside the cable core 1. And a basalt lapping layer 2 is lapped by using 25 mm-wide basalt fiber fireproof cloth. The thickness of the basalt lapping layer 2 is 0.2mm, the lapping rate is 15% -25%, and the lapping layer 1 is covered.
S4: an inner mica tape insulating layer 3 is lapped outside the basalt lapping layer 2. The inner mica tape insulating layer 3 is provided with four layers of wrapping, wherein the two layers of wrapping are firstly carried out in the left direction and then carried out in the right direction.
S5: and a basalt braided layer 4 is braided outside the inner mica tape insulating layer 3. The thickness of the basalt braided layer 4 is 0.2 mm. The basalt braided layer 4 is formed by braiding high-temperature-resistant braided basalt fibers, a 32-spindle braiding machine is adopted, 12 bundles of high-temperature-resistant basalt fibers are braided in each spindle, the braiding angle is 35-45 degrees, and the braiding density is larger than or equal to 85 percent. The basalt braided layer 4 meets the requirements that the tensile strength of the fiber is more than or equal to 2600MPa at normal temperature, the tensile breaking strength of the yarn after heat treatment is more than or equal to 0.20N/tex, and the strength retention rate is more than or equal to 50%.
S6: and an outer mica tape insulating layer 5 is wrapped outside the basalt braided layer 4. The outer mica tape insulating layer 5 is provided with four layers, namely, two layers are wound in the left direction and two layers are wound in the right direction.
S7: and a basalt sheath 6 is woven outside the outer mica tape insulating layer 5. The thickness of the basalt sheath 6 is 0.2 mm. The basalt sheath 6 is formed by weaving high-temperature-resistant basalt fibers, a 32-spindle weaving machine is adopted, 15 bundles of high-temperature-resistant basalt fibers are woven in each spindle, the weaving angle is 35-45 degrees, and the weaving density is not less than 85 percent. The basalt braided layer 4 meets the requirements that the tensile strength of the fiber is more than or equal to 2600MPa at normal temperature, the tensile breaking strength of the yarn after heat treatment is more than or equal to 0.20N/tex, and the strength retention rate is more than or equal to 50%.
The above embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A preparation process of a large-section high-temperature-resistant mobile flexible cable for high-temperature equipment is characterized by comprising the following steps:
s1: a stranded conductor (1-2);
s2: stranded cable core (1): arranging the conductor (1-2) around a central cooling tube (1-1) to make a first conductor layer; arranging the conductors (1-2) and the cooling pipes (1-3) outside the first conductor layer at intervals to form a cooling layer; arranging the conductor (1-2) outside the cooling layer to form a second conductor layer; -regularly stranding the central cooling tube (1-1), the first conductor layer, the cooling layer and the second conductor layer to make the cable core (1);
s3: a basalt lapping layer (2) is wound outside the cable core (1); the thickness of the basalt lapping layer (2) is 0.2mm, the lapping rate is 15% -25%, and 1 layer of lapping is carried out;
s4: an inner mica tape insulating layer (3) is wrapped outside the basalt wrapping layer (2);
s5: a basalt braided layer (4) is braided outside the inner mica tape insulating layer (3);
s6: an outer mica tape insulating layer (5) is wrapped outside the basalt braided layer (4);
s7: and a basalt sheath (6) is woven outside the outer mica tape insulating layer (5).
2. The preparation process of the large-section high-temperature-resistant mobile flexible cable for the high-temperature equipment according to claim 1, wherein the preparation process comprises the following steps: in the S1, the conductor (1-2) is formed by twisting 52 nickel-plated copper strands with the wire diameter of 0.390 mm.
3. The preparation process of the large-section high-temperature-resistant mobile flexible cable for the high-temperature equipment according to claim 1, wherein the preparation process comprises the following steps: in the step S2, six strands of conductors (1-2) are arranged around a central cooling pipe (1-1) to form a first conductor layer; arranging six conductors (1-2) and six cooling pipes (1-3) outside the first conductor layer at intervals to form a cooling layer; eighteen conductors (1-2) are arranged outside the cooling layer to form a second conductor layer; the central cooling pipe (1-1), the first conductor layer, the cooling layer and the second conductor layer are regularly twisted to form the cable core (1).
4. The preparation process of the large-section high-temperature-resistant mobile flexible cable for the high-temperature equipment according to claim 1, wherein the preparation process comprises the following steps: in the step S2, the central cooling pipe (1-1) and the cooling pipe (1-3) are hollow copper tubes filled with cooling media, and the cooling media include liquid nitrogen and air; the inner diameters of the central cooling pipe (1-1) and the cooling pipe (1-3) are 2.0mm, and the pipe wall thickness is 0.5 mm.
5. The preparation process of the large-section high-temperature-resistant mobile flexible cable for the high-temperature equipment according to claim 1, wherein the preparation process comprises the following steps: the inner mica tape insulating layer (3) and the outer mica tape insulating layer (5) are wound in multiple layers, and the winding direction is changed every two layers.
6. The preparation process of the large-section high-temperature-resistant mobile flexible cable for the high-temperature equipment according to claim 1, wherein the preparation process comprises the following steps: and the basalt lapping layer (2) adopts basalt fiber fireproof cloth with the width of 25 mm.
7. The preparation process of the large-section high-temperature-resistant mobile flexible cable for the high-temperature equipment according to claim 1, wherein the preparation process comprises the following steps: in the step S5, the basalt braided layer (4) is braided by adopting 32-spindle high-temperature-resistant basalt fibers, each spindle is provided with 12 bundles of high-temperature-resistant basalt fibers, and the braiding density is more than or equal to 95%; the basalt braided layer (4) meets the requirements that the tensile strength of the fiber is more than or equal to 2600MPa at normal temperature, the tensile breaking strength of the fiber after heat treatment is more than or equal to 0.20N/tex, and the strength retention rate is more than or equal to 50 percent; the thickness of the basalt braided layer (4) is 0.2 mm.
8. The preparation process of the large-section high-temperature-resistant mobile flexible cable for the high-temperature equipment according to claim 1, wherein the preparation process comprises the following steps: in the step S7, the heat-resistant basalt fiber is adopted to weave the basalt sheath (6), a 32-spindle weaving machine is adopted to weave, 15 bundles of high-temperature-resistant basalt fiber are woven in each spindle, and the weaving density is larger than or equal to 95%; the basalt sheath (6) meets the requirements that the tensile strength of the fiber is more than or equal to 2600MPa at normal temperature, the tensile breaking strength of the fiber after heat treatment is more than or equal to 0.20N/tex, and the strength retention rate is more than or equal to 50%; the thickness of the basalt sheath (6) is 0.2 mm.
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| CN202010291704.4A CN111540538B (en) | 2020-04-14 | 2020-04-14 | Large-section high-temperature-resistant mobile flexible cable for high-temperature equipment and preparation process thereof |
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| CN111540538B true CN111540538B (en) | 2022-01-14 |
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| CN111540538A (en) | 2020-08-14 |
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